SURFACE-DIFFUSION AND ADATOM-INDUCED SUBSTRATE RELAXATIONS OF PT, PD, AND NI ATOMS ON PT(001)

被引：42

作者：

KELLOGG, GL ^{[1
]}

WRIGHT, AF ^{[1
]}

DAW, MS ^{[1
]}

机构：

[1] SANDIA NATL LABS,LIVERMORE,CA 94551

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS | 1991年 / 9卷 / 03期

关键词：

D O I：

10.1116/1.577457

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Field ion microscope observations show that Pt atoms diffuse on Pt(001) by an adatom-substrate atom replacement mechanism, whereas Pd atoms diffuse on the same surface by site-to-site hopping. Ni adatoms are observed to exchange with substrate Pt(001) atoms at temperatures lower than the onset of their migration. The propensity for adatom-substrate atom exchange is found to be correlated with the amount of adatom-induced substrate relaxation. These relaxations are determined from calculations based on the embedded atom method.

引用

页码：1757 / 1760

页数：4

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